2 years ago

2+2, you guys were helpfulllll. : )

Mathematics

1 answer:

katrin2010 [14]2 years ago

8 0

Answer:

The correct answer is 2+2=4

thanks

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a bookcase has 2 shelves the top shelf has 10 more than 1/3 the number of books on the bottom shelf. there are 12 books on the b

solniwko [45]

There would be 14 on the top shelf

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3 years ago

Jamal bought a diamond ring at a 20% discount. He paid $2640 for the ring. Naomi bought a similar ring but was given a discount

Fudgin [204]

Answer: 72%

Step-by-step explanation:

Set Jamal's original ring price = x

$x - x(0.2) = 2640\\x(1-0.2)=2640\\x(0.8)=2640\\x=\frac{2640}{0.8}=3300$

Jamal's original ring price = $3300

Set Naomi's discount = y

$3300-3300(y)=924\\=3300(1-y)=924\\1-y=\frac{924}{3300} \\-y=\frac{924}{3300} -1\\y=1-\frac{924}{3300}=1-0.28=0.72$

Naomi's discount is 0.72 = 72%

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2 years ago

9.50 One way to evaluate the effectiveness of a teaching assistant is to examine the scores achieved by his or her students on a

EleoNora [17]

Answer:

Step-by-step explanation:

Given that a professor sets a standard examination at the end of each semester for all sections of a course. The variance of the scores on this test is typically very close to 300.

$H_0: s^2 = 300\\H_a: s^2 \neq 300$

(Two tailed test for variance )

Sample variance =480

We can use chi square test for testing of hypothesis

Test statistic = $\frac{(n-1)s^2}{\sigma^2} \\=62.4$

p value = 0.0100

Since p <0.05 our significance level, we reject H0.

The sample variance cannot be claimed as equal to 300.

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3 years ago

1) Given a (x) =6x+2 and b (x) = -8x -11

Elenna [48]

I hope this helps you

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3 years ago

The entry fee for a charity event is $15 per pair of people. The fee can be

Genrish500 [490]

Answer:

660

Step-by-step explanation:

First, to find out how much money they have collected so far, you need to add 7100 + 1300 which is 8400. 8400= $8.40. So now you know that they have collected 8.40, you need to subtract 1500-840 which = 660

Hope this helps!

6 0

3 years ago

Read 2 more answers